class_docstr: MRC Sample class to hold the mrc data info and provide atomic operations.
docstr: Delete the word seat in del_index.
  
  :param str field:field name
  :param int|list|slice index: modified scope
  :return: modified sample
docstr_tok: ["Delete","the","word","seat","in","del_index",".",":","param","str","field",":","field","name",":","param","int|list|slice","index",":","modified","scope",":","return",":","modified","sample"]
code: def delete_field_at_index(self, field, index):
      r"""
      Delete the word seat in del_index.
  
      :param str field:field name
      :param int|list|slice index: modified scope
      :return: modified sample
  
      """
      return self.delete_field_at_indices(field, [index])
  
imports: from .cnsample import CnSample
  from ..field import Field, CnTextField
  from ....common.utils.list_op import normalize_scope
  from ....common.preprocess.nltk_res_load import ModelManager
  from ....common.settings import *
  from nltk.stem.lancaster import LancasterStemmer
  from copy import deepcopy
label_desc: Use image node_id 11 for calling the MRCCnSample obj's underlying member method code with example usage: obj.delete_field_at_index(field, index) and returns: self